#include<unistd.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<stdlib.h>

int main(){
    char c;
    int in, out;

    in = open("file.in", O_RDONLY);
    out = open("file.out", O_WRONLY|O_CREAT, S_IRUSR|S_IWUSR);

    while(read(in, &c, 1) == 1){
        write(out, &c, 1);
    }

    exit(0);
}
